Electrically-controlled plate casting and trimming machine



Se t. 3, 1929 H. A. w. WOOD 1,726,737

ELECTRICALLY CONTROLLED PLATE CASTING AND TRIMMING MACHINE OriginalFiled Nov. 25, 1925 6 Sheets-Sheet l kgi /W &

Sept. 3, 1929. H. A. w. WOOD ELECTRICALLY CONTROLLED PLATE CASTING ANDTRIMMING MACHINE Original Filed Nov. 23-, 1925 6 Sheets-Shem Sept. 3,1929. H. A. w. WOOD ELECTRICALLY CONTROLLED PLATE CASTING AND TRIMMINGMACHINE Orig'iinal Filed Nov. 23, 1925 6 Sheets-Sheet H. A. W. WOODOriginal Filed Nov. 23, 1925 6 Sheets-Sheet 4 Sept. 3, 1929.

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H. A. w. WOOD Sept. 3, 1929.

ELECTRICALLY CONTROLLED PLATE CASTING AND TRIMMING MACHINE OriginalFiled Nov. 25, 1925 6 Sheets-Sheet 6 Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

HENRY A. "WISE WOOD, OF NEW YORK N. Y., ASSIGNOR 'IO WOOD NEWSPAPERMACHINERY CORPORATION, OF NEV YORK, N. Y., A CORPORATION OF VIRGINIA.

ELEOTRICALLY-CONTROLLED PLATE CASTING AND TRIMMING MACHINE.

Application filed November 23, 1925, Serial No. 71,014. Renewed February12, 1929.

This invention relates to the operation and control of the usualsequence of operations in a machine for casting, cooling and trimmingstereotype printing plates. The invention is not limited to anyparticular type of machine but is capable of general use, not only forstereotype casting machines, but for other machines in which a castingis made and then trimmed by the operation of the machine.

This invention is designed to provide for electric control. andoperation of the opening and closing of the mold, the filling of themold with molten metal, the delivery of the plates from the mold, andthe mechanical trimming of the cast; in the case of a stereotypeprinting plate, the mechanical trimming consists in sawing off the tailor riser and trimming the other end. These Junior Autoplate machines asactually constructed have required the manipulation of three separatelevers for controlling the opening and closing of the mold, the pumpingof the metal and the delivery of the plate and sawing ofi the tail. Twoof these levers require considerable manual exertion in order to operatethem in these machines. In accordance with this invention the severalfunctions are performed by power, furnished preferably by electricmotors, and the sequence of operations is controlled automatically bythe electrical apparatus.

The invention also involves independently of the above indicatedcombination, the electric operation and control of each of saidfunctions by itself. 1

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 isa plan of an ordinary Junior Autoplate casting and tail sawing machineprovided with a preferred embodiment of the present invention involvingelectrical controlling and operating features, and shown with the moldclosed;

Fig. 2 is a similar view shown with the mold open;

Fig. 3 is a side view with the mold closed;

Fig. 4 is a similar view with the mold open;

Fig. 5 is a sectional view on the line 55 of Fig. 1 showing the pump andits operating and controlling mechanism;

Fig. 6 is a plan of the machine modified to provide a different type ofcontrol of the means for delivering the plates; 7

Fig. 7 is a sectional view similar to Fig.

5 showing a modification of the method of operating the pump plunger;

Fig. 8 is a diagram of the electric connections for the constructionshown in the first five figures;

Fig. 9 is a similar electric wiring diagram showing the operation of themodification illustrated in Fig. 6; and

Fig. 10 is a similar diagram to go with Fig. 7. I

In the first five figures, I have shown the invention as applied to awell known casting machine known in the trade as the Junior Autoplate inwhich a core 1 rotates on a vertical axis and a back 2 reciprocatestoward and from it so as to close the mold and open it. The means forreciprocating the back involves a shaft 5 provided with toggles 3 and 4.On this shaft is a worm wheel 6 which is operated by a worm 7 on theshaft of the electric motor 8. This motor is supplied by power, as willbe seen later, to rotate the shaft through a half revolution to closethe mold and then stop it, and it is then rotated through a halfrevolution in the reverse direction to open the mold and then is stoppedand automatically started again to cast another plate.

' When the mold, with a matrix therein, is closed, the metal is pumpedinto it by a pump comprising a pump cylinder 13, piston 14, piston rodand operating lever 16. This operating lever 16 has been operated byhand heretofore or at last some equivalent of it. When this lever isoscillated, it imparts a movement'of reciprocation to the piston 14which, in the form of pump shown, pumps a charge of molten metal intothe mold through a spout 17 upon the raising of the piston. This pistonin this case is operated by a motor 20 having a worm 19 on its shaftmeshing, with a segmental worm wheel 21 fixed to a shaft on which thelever is also fixed. This motor is arranged to turn in one directionthrough an are limited by the stroke of the piston and the angle of thesegmental worm and then back'again to raise and lower the piston. Meansis provided, as will be shown later, for automatically returning thepiston after a charge of metal has been poured.

Electric means is provided, so timed that when enough time has elapsedto allow the metal in the mold to solidify sufficiently for removal, themotor 8 will start automatically to operate to open the mold and thepiston 14: will move down to its lowermost position ready for the activereciprocation. The limitation of the movement of the piston rod iselectrically controllechas will appear.

The core 1 rotates a half revolution at a time through a thirdmotor 32,bevel gears 31 and driving shaft 30. This driving shaft has a Worm 29operating a worm wheel 28. On top of the core-isa horizontally bevelledgear 26 with which meshesa bevel .gearQ'T on a shaft 33. This shaftextends diametrically across the top of the core and is provided with aclutch 34L slidable thereon and meshing with a clutch section onithevworm wheel 28. This motor 32, instead of operating ;intermittently andalternately in the reverse directions as the motors 8 "and 20 do, .runsconstantly. Accordingly. the worm wheel 28 rotates constantly. When it.is desired to rotate the core 1, the shaft 33 is connected with theworm wheel 28 by the clutch 34. This clutch is operated bya lever 35electrically, as will appear.

The motor 32 rotatesthe shaft-30 constantly. This shaft. through gears10, drives another vertical shaft- 38* which is mounted on a saw-hanger38 that is pivoted on the shaft 30 to swing about that shaft as acenter. On the saw shaft there are rotary cutters or saws 39 whichrotate constantly irrespective of the position of the frame 38.

On the worm wheel 6 is a face cam which operates a lever 37 pivotallyconnected with a rod 37* which is in turn pivotally connected with theframe 38. The motion of this lever 3 therefore. swings the frame 38 backand forth about its axis 30 to brine; it into and out of position forthe saw 39 to cut through the late on t e core as it turns around fromcastine' to delivering; position. The cutter or saw 39 thus cu s thetail from the plate while the plate is beine' delivered. and it is br u'ht into act on only when the back is moved awav from the co e. Theother saw 39 tr ms the other end of the plate.

R fer nq now o the wirin diagram (Fin. R t will he se n that the back 2.is provided with a proiection at the bottom having a sw tch-bar 12provided wi h wedee-shaped ends. and is also provided with a cent alprojection 47. These wedge-shaped ends are of insulating material andopen two pairs of contacts 10 and 11 alternately when the back is ineither extreme position, allowing them to close at .all other .times.

The wiring diagram does not disclose the wiring for the motor 3221s thatis connected up so that by the usual switch it :is thrown into operationwhen the machine is started and continues to operate all the time aslong as .the machine is running, and in facteven if the machine isstopped for short intervals this motor ordlnarlly will be kept inoperation. There is nothing automatic in its con- L The mechanism isunder the control of a starting button 4-1 and a stop switch 81 whichare located in the circuits as will appear. The machine is started bypressing the starting button and stopped by breaking the main lineconnection by means of the stop switch 81. lVhen the starting button.izrlis pressed connection is made so that the current flows from themain line past the contacts 11 which are open and through the contacts10 which are closed, through the stop switch which is also closed,through a coil -15, and around the line throu 'h button ell, to the mainline 101. The only elfcct of this at this time is to energize the coilwhich closes a switch 46, bringing together four pairs of contacts inthe position marked Forward This connects one terminal of the motor 8through a pair of contacts next to the top ones in said switch 4-6 withthe main 100 directly. The central tern'linal of the motor is connectedthrough the third pair of contacts directly with the main 101, and thethird ter minal is connected through the top pair of contacts, as shownin the drawings, with the main 102. Therefore, this motor, which isshown in this case as a three-phase motor, is started. Also the main 101is connected through the bottom pair of terminals of the switch 4:6through the coil 145, stop switch 81, contacts 10, with the line 100,thus keeping the coil 4:5 energized and the switch 10 closed, althoughthe push button is allowed to be opened by usual springs as soon as ithas been pushed to start the currents flowing. Now, of course, thepushing of the stop switch 81 and then letting it drop back would cutout the coil l5 and allow the switch 4-0 to open by the usual spring andthus stop the motor 8 but not until it has completed its cycle.

The motor 8 is now in action and it immediately starts the back 2forward toward the core, allowing the contacts 11. to close. During theforward motion of the buck the lug l7 engages the lever 4-8 and closes apair of contacts 49 which previouslr had been open. This lever 48 isltcpt in neutral position and restored thereto l, pair of spring-3s. Theclosing of the contact 4-0 allows the current to flow from the main 101,around the loop over the open contacts 51, to closed contacts 10 andthrough a coil 50 which acts to close contacts 51 and open contactsirlthousrh when the lug i? passes over and beyond the switch lever 4.8that is restored to neutral position and the contacts 4-9 are openedagain. yet the coil 50 remains energihed from the main 101. The currentpasses then directly to the contacts 51 now closed. through the coil 50.to pair of closed contacts 59. and then directly to the main 100. Nowwhen the back moves lltl clear up to casting position the other end ofthe switch bar 12 opens the contacts 10 which are directly in serieswith the coil 45 and therefore de-energizes that coil, opens the switch46 and stops the motor 8. It is to be noticed, however, that when thecontacts 10 are opened by the switch bar 12 the pair of contacts 54 willbe closed. This results in the connection of the circuit from the main101, through the contacts 51, contacts 54, coil 55, which closes aswitch 56, and back to the main 100 through contacts 59. The coil 55 isin a shunt closed by the contacts 54 and therefore receiving enough ofthe current to operate the switch as the coil 55 is designed so as to beoperated by part of the current in the main line, as by having moreconvolutions than the coil 50.

The completion of this circuit closing the switch 56 connects the motor20 to the threephase circuit in the same manner as described ends arelocated limit switches 23 and 24 which the bar is adapted to engage forthe purpose of opening the contacts 59 which have been mentioned and apair of contacts 69 through a pair of levers 58 and 68.

The plug 57 is so adjusted on the bar 25 that when the piston has risenhigh enough to discharge a complete charge of molten metal into themold, this plug will engage the lever 58 and open the contacts 59. Thefirst result of this is to de-energize both coils and which are inseries with this contact. This results in the automatic opening of theswitch 56 which stops the motor 20 as will be obvious. But the coil 61is now energized, as its circuit is completed from the main 101 throughthis coil, contact 52, contact 69, which is automatically closed whenthe bar 25 leaves it on the upward stroke, and back to the maln 100.This closes the switch 62 which connects up the motor 20 in the reversedirection and causes the motor to move the plunger down. When theadjustable plug 67 engages the lever 68 and opens the contacts 69, thecoil 61 1s de-energized as will be obvious and the swltch 62 opens,causing the motor 20 to come to rest.

The return of the piston after the metal is discharged into the mold isso regulated that when a sufficient interval of time has elapsed toallow the molten metal to solidify and permit the mold to be opened, alug 22 adjustably secured on the bar 25 or on the piston rod 15 strikesa lever 64 projecting from the timer switch 21. This closes the contact65 momentarily, which results in the excitation of a coil66, the currentflowing from the main 101 directly to the contact 65 and then to thecoil 66 around through the contacts 11 to the main 100. This closes theswitch 70 and starts up the motor 8 in the reverse direction. This motoroperates to draw the back 2 away from the core. After the switch 70operates, the coil 66 remains in circuit, even though the contact 65 isopen. This takes place in the same manner as is described in connectionwith the coil 45. This movement of the back 2 acts through the link 37to swing the saw frame into a position adjacent to the core so that, asthe plate swings around with the core, the tail will be severed by theconstantly rotating saw 39. I

As the casting box nears the end of its backward motion, the lug 47engages the lever 48 and closes contact 71 which connects the main 101through the contact 71 with solenoid 36 and then back through the stopswitch and contacts 10 to the main 100.

The operation of the solenoid 36 draws the plunger 72 and with it thelever 35 back so as to pull the cam roll 74 out of the notch in the coreclutch cam 76 and this permits the core to rotate to deliver the plate,as will appear later. The back completes its backward motion until theswitch bar 12 opens the conopens, which brings the core to a standstill.

This action takes place, the clutch of course being operated directly bythe solenoid and the lever 35, at the same time that the contact 80 ismade by the swinging of the lever 35 back into normal position. This inconjunction with contact 78 closes the circuit which energizes the coil45. Therefore the switch 46 closes and the motor 8 starts up to move theback forward exactly as stated at the beginning of the description ofthe operation andanother cycle of operations is automatically repeated.It will be understood, of course, that this repetition will be kept upautomatically as long as desired without further attention but that allthe casts during this period are made from the same matrix.

If it is desired to changethe matrix, or stop the operation for anyreason, the stop switch 81 is pushed to open the circuit through thecoil 45. Therefore, even though this happens in the midst of thesequence of operations for manufacturing a plate the apparatus willcontinue to function until one more plate is made and the tail removed.Then, and only then, will it stop with the casting box open ready forits matrix tov be removed and a new one inserted. All these operationstake place without the necessity of the operator having to repositionthe machine to eflect a change of matrix.

Fig. 6 shows a slightly different embodiment of the above invention inthat motor 32, instead of running constantly as is the case in the abovedescribed construction, is started by means of suitable electricalconnections, shown in Fig. 9, only when it is desired to rotate thecore, and is stopped when the cylinder has completed its halt revolu-'tion. This is done by eliminating the clutch 34 and substituting thenecessary electrical apparatus as shown in Fig. 9 in which the wiring isthe same as in Fig. 8 except as indicated.

This operation of the machine is as follows:

As the casting box opens, lug 47 strikes lever 48, making a momentarycontact 76. This energizes coil 60 which closes switch 63, causing motor32 to rotate the core and the core cam. As the core cam rotates, camroller 74 rides out of the notch and contact is closed, keeping coil 60energized after contact 76 is broken. When the core has made one-halfrevolution, the cam roller drops in the notch on the core cam, thusopening contact 53 through lever 35. This deenergizes coil 60, allowingswitch 63 to open, which stops motor 32 and the rotation of the core.The operations are then carried on as de scribed in the first fivefigures,

Fig. 7 is another embodiment of the method of operating the pump. Vhilein the arrangement described above, the pump is controlled by a motorwhich reciprocates the piston rod through suitable gearing, in Fig. 7, Ishow a pump operated by solenoid. 43 which pulls the piston upwardly,the reversal of the piston being accomplished by gravity. While themethod of controlling the solenoid is simliar to that used forcontrolling motor 20, it is specifically controlled as shown in Fig. 10.

The method of operation is herewith described:

As the casting box begins to close, lug 47 strikes lever 48, makingcontact 49 momentarily. This energizes coil 50 which closes contact 5'1.Coil 50 remains energized after contact 49 is broken.

hen the mold fully closes, contact 54 is made energizing solenoid 43.This causes plunger 83, which is secured to piston rod 15, to moveupward thus pumping metal into the mold. When sufiicient metal has beenpumped, plug 84, which is adjustably secured t0 piston rod 15, strikeslever 85, opening contact 86. This deenergizes both solenoid 43 and coil50 allowing gravity to pull the pump plunger down. The remainingoperations are the same as those shown in the first live figures.

It will be seen theretore that by this invention all laborious manualexertions on the part of the operator are entirely eliininawd in thisclass of machines and that l have substituted theretor merely a pushbutton l'or starting the machine and a stop button for stopping it. Ihave provided tor the automatic operation ol the machine to complete acast after the stop button is pushed to disooin meet the motors troznthe power at! or the cycle. of operations is finished. 'l his not onlyiavoids manual exertion on the part of the operator but fiees him ti-omconstant attendance on the machine so that one operator might be able torun more than one ma hine. Other advantages are secured as T have statedabove.

Although I have illustrated and described only three forms of theinvention. ll. am aware of the tact that the electrical eonnections canbe ehzu'iged by any one skilled in the art without departing f om thescope of the invention as GXDIQSSQll in the claims.

Therefore I do not wish to be limited in these respects, but what I doclaim is 1. In a stereotype printing plate *asting machine, thecombination with a rotatable core and a reciprocable back togetherconstituting the mold, of a shaft, means operated by the shaft formoving the back to and from the core, a motor connected with the shaft,m ans for connecting the motor with a source of power to operate toclose the mold, auton'iatically actuated. means tor disconnecting themotor from the source of power when the back has reached its innermostposition adjacent the core. means For automatically connecting saidmotor with the source oil power in reverse after a casting has beenchilled in the mold to cause the motor to turn in the opposite directionand swing said means hack to move the back to its original position,automatic means operated by the movement ot the hack for disconnectingthe motor when the back reaches its extreme 01 en position, and meansfor autoinzuicz ll v starting the motor again to cause another completereciprocation of the back.

2. The combination with a stereotype plate casting machine, comprising acore and a reciprocable back, of a motor, means operated by the motorfor moving the back to and from the core, an electric circuit comprisinga starting button and a coil connected to be energized by the pushingot' the starting button, a switch in position to be closed by the coil,conductors adapted to be con nected with a source of power and with saidmotor by said switch to cause the motor to rotate and move the backtoward the core, a lug movable with the back, a contact operated by saidlug, a conductor adapted to be closed by said contact, a second coilconnected with said conductor and adapted to berenderedoperativewhenthatcontact is closed, a switch operated by thesecond coil and arranged to keep the coil energized as the back movesforward, and means carried by the back for opening the circuit to thefirst mentioned coil and allowing the switch to open when the back movesinto closed or casting position against the core, thereby causing themotor to stop.

3. In a casting machine, the combination with a core and a reciprocableback, together constituting the mold, of a shaft, arms on the shaft,links operated by said arms for moving the back to and from the core,means for opcrating the shaft, means for connecting the first namedmeans with a source of power to operate to close the mold, automaticmeans for connecting the first named means with the source of power inreverse after a casting has been chilled in the mold to swing the armsback and move the back away from the core, means for disconnecting thefirst named means when the back reaches its extreme open position,automatic means for starting the first named means again to causeanother complete reciprocation of the back, and a stop switch forstopping the continued operation of the back.

4. In a casting machine, the combination with a core and a reciprocableback together constituting the mold, of a shaft, means operated by saidshaft for moving the back to and from the core by a half revolution ofthe shaft, manually controlled means for connecting the shaft with asource of power to close the mold, automatically actuated means fordisconnecting the shaft from the source of power when the shaft isrotated half a revolution to close the mold, and automatic means forconnecting said shaft with the source of power in reverse after acasting has been chilled in the mold to cause the shaft to turn in theopposite direction and move the back to its original position.

5. In a casting machine, the combination with a core and a concave backtogether constituting the mold, of a shaft, means operated by said shaftfor moving the back to and from the core by a part revolution of theshaft, manually controlled means for connecting the shaft with a sourceof power to close the mold, and automatically actuated means controlledby the back for disconnecting the shaft from the source of power whentheshaft is rotated far enough around to close the mold.

6. In a machine for casting, the combination with a rotatable core and areciprocable back, of means for moving the back to and from the core,means for connecting the first named means with a source of energy,means operated by motion of the back for disconnecting the first namedmeans from said source when the back engages the core, and automaticallyactuated means for thereafter connecting the first named means againwith a source of power in the reverse to move the back away from thecore.

7. In a machine for casting, the combination with a core, and a concaveback together constituting a mold, of means for moving the back to andfrom the core, means for connecting the first named means with a sourceof energy, and means operated by motion of the back for disconnectingthe first named means from said source when the back reaches itsinnermost position adjacent the core.

8. In a casting machine, the combination with a two-part mold, one partbeing reciprocable, of a motor and means for connecting anddisconnecting the mold with the motor to close the mold, automaticallyopen the mold after an interval for the setting of the casting, andrestart the cycle of operations automatically.

9. In a machine for casting stereotype printing plates, the combinationwith a core and a concave back, of means for reciprocating the back-toand from the core, means operated by motion of the back for stopping theback when the mold completely closes, a pump for supplying the mold withmetal, means for operating the pump, and means for automaticallystopping the operation of the pump when the back reaches its innermostposition adjacent the core.

10. In a stereotype plate casting machine, the combination with a coreand a reciprocable back constituting the mold, of a motor, electricallycontrolled means for operating said motor, means connected with themotor for reciprocating the back to and from the core, a second motor, apump having a piston connected to be operated by the second motor forintroducing metal into the mold, means carried'by the back for breakinga contact when the back closes against the core and stopping the firstmotor, means carried by the back for making a contact when the backcloses against the core for closing a circuit to connect the secondmotor with a source of power, means connected with the piston forreversing the connection of the second motor 7 with the source of powerwhen the piston moves to a position to fill the mold to bring the pistonback to its inactive position, and means for then stopping the secondmotor and piston.

11. In a stereotype plate casting machine, the combination of a core anda reciprocable back constituting the mold, with a motor, electricallycontrolled means for operating said motor, means connected with themotor for reciprocating the back to and from the core, a second motor, apump having a piston connected to be operated by the second motor forintroducing metal into the mold, means ca 'ried by the back forbreakinga contact when the back closes against the core and stopping the firstmotor, means carried by the back for making a contact when the backcloses against the core to connect the second motor with a source ofpower, and means connected with the-piston for reversing the connectionof the second motor with the source of power when the piston moves to aposition'to fill the mold with metal, the means for controlling thesecond motor comprising two switches each" having a' coil for operatingit, said coils being in said circuits, one of said coilsbcing'connectedto be deenergized by the movement of the piston to its extreme positionfor filling themold, thereby causing its switch to open andst'op thesecond-motor, the other coil'being connected to be energized at the sametime for closingits switchto reverse 1? motor.

12. Ina casting machine, the combination OI a core: and a reciproca'bleback constituting the mold, with means for reciprocating the back to andfrom the core, a motor, a pump having a piston connected to be operatedby the motor for introducing'metal into themold, means carried bytheback for making a contact when the back closes against the coretoconnect the motor with a source of power, and means connected with thepiston for reversing the connection of the motor with the source ofpower when the piston moves to a position to fill the mold with metal,the means forcon'trolling the motor comprising two switches each havinga coil for operating it, said coils being in said circuits, one or saidcoils being connected to be deenergized bythe movement of the piston toits extreme position for filling the mold, thereby causing its switch toopen and stop the motor, the other coilbeing connected to be energizedat the-same time for closingits switch and reverse'the motor.

13. In a casting machine, the combination with a" core and areciprocable back constituting the mold, of means for reciprocating theback to and frOnrthe core, a motor, a pump having a piston connected tobe operated by the motor for introducing metal into the mold, meanscarried by the back for making a contact when the back closes againstthe core for closing a circuit to connect the motor with a source ofpower, means connected'with the piston tor reversing the connection ofthe motor with the source of power when the piston moves to a positionto fill the mold to bring the piston back to its inactive position,means for stopping the motor and'piston, and means for automaticallyconnecting the motor to repeat the cycle of operation.

14. In a casting machine, the combination with a mold, of means forclosing and open ing the mold, said mold com'prising'a core and a backmovable to and from the core, a pump having a piston for supplying themold with metal, a motor for operating said piston, and means forautomatically connecting the mo tor with a source of power when the barkreaches its inner-most position adjacent the core.

15. In a casting machine, the combination with a mold, of a pump havinga piston tor supplying the mold with metal, a motor for operating saidpiston, means whereby when the mold closes the motor will be connectedzuu'omaticall with a source of power to raise the piston and fill themold, n ians for auto matically stopping and reversing the motor tolower the piston, and means actuated, by the lowering of ti e piston forcontrolling the automatic opening of the mold and delivery of thecasting from the mold.

16. In a machine for casting, the combination with a core, a concaveback, a pump for supplying the mold with metal, means whereby when themold closes connections will be made to operate the piston to fill themold, oi means for connecting the core to cause it to rotate and deliverthe cast plate, and means controlled by the pump for operating thesecond means.

17. In a machine for casting. the combination with a core, a concavellllt'ir, a pump 'l'or supplying the mold with metal, a. motor l'oroperating the piston of the pump, means whereby when the mold closes themotor will be connected with a source of power to raise the piston andfill the mold. of a constantly rotating shaft, a clutch tor connecting:the shaft with the core to rotate the core and deliver the cast plate,and means controlled by the pump piston for operating the clutch.

18. In a machine for casting. the combination with a core, a concaveback. a pump for supplying the mold. with metal, means for operating thepiston of the pump, means whereby when the mold closes the piston willbe connected with a source oi? power to raise the piston and fill themold. ot a constanilv rotating shaft, a clutch for connecting the shaftwith the core to rotate the core and deliver the cast plate, meansoperated by the pump piston for operating the clutch to -l art the coreto rotating, and means for stopping the rotation of the core with theplate thereon at the end of a hall revolution to deliver the plate.

19. In a machine for *asting, the combination with a core, a concaveback, means for moving the back, a pump for supplyimr the mold withmetal, means for operating the piston of the pump, and means wherebywhen the mold closes the piston will be connected with a source of powerto move the piston and fill the mold, of a constantly rotating: shall. aclutch for connecting the shaft with the core to rotate the core anddeliver the cast plate, means operated by the pump piston for operatingthe clutch to start the core to rotating. means for stopping therotation of the loo lllii lll) core with the plate thereon at the end ofa half revolution to deliver the plate, a constantly rotating saw shaft,a saw thereon, and means operated by the back moving means for movingthe saw shaft into position for the saw to cut the tail from the plateas the core commences to rot-ate.

'20. In a machine for casting stereotype printing plates, thecombination with a rotatable core, and a reciprocable back, of means formoving the back to and from the core, a saw shaft having a saw thereon,a pump for filling the mold, means controlled by the pump for rotatingthe core to deliver a cast plate, and means operated by motion of theback for moving the saw into a posit-ion to saw off the tail as thecasting is delivered.

21. In a machine for casting stereotype printing plates, the combinationwith a rotatable core, a reciprocable back, a pump, and a motor, ofmeans operated by the motor for moving the pump piston to fill the mold,means for connecting the motor with a source of electrical energ meanscontrolled by the pump for starting the core to rotate to deliver a castplate, a movable frame, a saw shaft on said frame, means operated bymotion of the back for moving said frame into position for the saw toremove the tail of the plate as the core rotates, automatically actuatedmeans for thereafter'stopping the core, and means for disconnecting saidmotor from the source of power and then connecting it in the reverse.

22. In a casting machine, the combination with a rotatable core and areciprocable back together constituting the mold, of a shaft, a

movable frame, a shaft with a cutter thereon mounted on said frame, acam on the first shaft having a cam guide extending part way around theshaft, means controlled by said cam for moving the frame to and from thecore by a part revolution of the shaft, where by the cutter will engagethe cast plate on the core, and automatic means for starting the core torotate when the cam moves the frame and cutter into position to out thetail from the plate.

23. In a stereotype plate casting machine, the combination of a core anda reciprocable back constituting the mold, with a motor, electricallycontrolled means for operating said motor, means connected with themotor for reciprocating the back to and from the core, a pivoted sawframe, a second motor, a pump having a piston connected to be operatedby the second motor for introducing metal into the mold, means carriedby the back for breaking an electrical contact in the first motorcircuit when the back closes and stopping the first motor, means carriedby the back for making a contact, when the back closes against the core,to connect the second motor with a source of power, means connected withthe piston for connecting the second motor with a source of power whenthe piston moves to a position to fill the mold with metal to cause themotor to reverse and bring the piston back to its inactive position,means controlled by said piston for automatically connecting the corewith a source of power to rotate it and deliver the cast plate thereon,and means operated by the first named motor for swinging said saw frametoward the core into position for the tail to be severed as the coreturns.

24. In a casting machine, the combination of a core and a reciprocableback constituting the mold, means for reciprocating the back to and fromthe core, a pivoted saw frame, a pump having a piston for introducingmetal into the mold, means carried by the back for stopping the backwhen the back closes against the core, means carried by the back foroperating the piston when the back closes against the core, means forreversing the piston when the piston moves to a position to fill themold with metal and bring the piston back to its inactive position,means controlled by said piston for automatically connecting the corewith a source of power to rotate it and deliver the cast plate thereon,and means operated by the back reciprocating means for swinging said sawframe toward the core into position for the tail to be severed as thecore turns.

25. In a machine for casting stereotype printing plates, the combinationwith a rotatable core and a reciprocable back constituting a mold, of apump having a piston for introducing metal into the mold, a motorconnected with the back for reciprocating it, a motor connected with thecore for turning it, a motor connected with the pump for reciprocatingthe piston, and electrically operated connections for automaticallyoperating said motors in a predetermined order and stop ping them toclose the mold, introduce a charge of metal therein, open the mold, andturn the core a half a revolution to deliver the plate.

26. In a machine for casting stereotype printing plates, the combinationwith a core and a concave back, together constituting a mold, of amotor, means operated by said motor for moving the back to and from thecore, means actuated by the back moving means for connecting the motorwith a source of electrical energy and for automatically disconnectingthe motor from said source when the back reaches its innermost positionadjacent the core.

27. In a machine for casting stereotype printing plates, the combinationwith a core and a concave back, together constituting a mold, of amotor, means operated by said motor for moving the back to and from thecore, means actuated by the back moving means for connecting the motorwith a source of electrical energy and for automatically disconnectingthe motor from said source when the back reaches 1ts inn rmost positionad acent the core, and means for there tt-er automatically connectingsaid motor again" with a source of power to cause the motor to reverseor turn in the opposite direction and move the back away from the core.

28. In a stereotype plate casting machine, the combination with a core,a back movable toward and from said core, the core and back togetherconstituting a mold, of a motor, means operated by the motor for movingthe back to and from the core, electrically controlled means forstopping the motor when the back reaches its innermost posit-ionadjacent the core, electrically controlled means for reversing the motorso timed as to allow the casting to set, means for stopping the motorwhen the back reaches the tarthermost position from the core, and meansfor restarting said cycle of operations.

29. In a stereotype printing plate casting of power to operate to closethe mold, automachine, the combination with a rotatable the core, amotor connected with the shaft, means for connecting the motor with asource matically actuated means for disconnecting core and areciprocable back together constiby the shaft for moving the back to andfrom tuting the mold, of a shaft, means operated the motor from thesource of power when the back has reached its innermost positionadjacent the core, and means for automatically connecting said motorwith the source of power in reverse after a casting has been chilled inthe mold to cause the motor to turn in the opposite direction and swingsaid means back to n'iove the back to its original position.

30. The combination with a stereotype plate casting machine, comprisinga core and a reciprocable back, of a motor, means operated by the motorfor inoying the hack to and from the core, an electric circuit, a lugmovable with the back, a contact operated by said lug, a conductoradapted to be closed by said contact, a second coil connected with saidconductor and adapted to be rendered operative when that contact isclosed, a switch operated by the second coil and arranged to keep thecoil energized as the back moves forward. and means carried by the backfor opening the circuit to the first mentioned coil and allowing theswitch to open when the back moves into closed or casting positionagainst the core, thereby causing the motor to stop.

In testimony whereof I have hereunto aitfixed my signature.

HENRY A. WISE WOOD.

